Hi Hugh
Welcome to the forum.
There is a lot of information on here that can help you both. Unfortunately you being the closest to her, is the reason for you being the target for her anger. Maybe the first threads you should read are the ones about setting boundaries, may sound harsh, but doing that can be a good start for both of you.
Come down to the supporters area, you will be made welcome, and be offered any advice, support and information you may need to start this journey of healing together.
No one will tell you it will be easy, no one will be able to tell you how long it will take, a lot depends on how your wife takes to the therapy and any treatment she is offered.
Remember to take care of yourself along the way, and no this is not being selfish, it is a vital part of life with PTSD.
Take care.
Amethist